C.E.A - Colon Cancer Marker

CEA (carcinoembryonic antigen) is a protein found in the tissues of a developing baby. CEA levels normally become very low or disappear after birth. Healthy adults should have very little or no CEA in their bodies. A CEA test is used to monitor the treatment of people with colon cancer. However, CEA can be falsely elevated in smokers.

Having an elevated CEA does not mean you have cancer but you may require a colonoscopy for further investigation.

Symptoms of colon cancer

  • A persistent change in your bowel habits
  • Rectal bleeding or blood in stool
  • Persistent abdominal discomfort
  • A feeling that your bowel doesn't empty completely
  • Weakness or fatigue
  • Losing weight without trying


  • Eat a variety of fruits, vegetables and whole grains
  • Drink alcohol in moderation
  • Exercise most days of the week
  • Stop smoking
  • Maintain a healthy weight


 The normal ranges: < 5.1 ug/L
*Normal value ranges may vary slightly among different labs. Some labs use different measurements or may test different specimens. Talk to your provider about your test results.